/*
* Copyright 2008 Udai Gupta, Ralf Joachim
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.castor.cpa.query.object.parameter;
import org.castor.cpa.query.Condition;
import org.castor.cpa.query.Parameter;
import org.castor.cpa.query.object.condition.Null;
import org.castor.cpa.query.object.expression.AbstractExpression;
/**
* Abstract base class for parameters.
*
* @author <a href="mailto:mailtoud AT gmail DOT com">Udai Gupta</a>
* @author <a href="mailto:ralf DOT joachim AT syscon DOT eu">Ralf Joachim</a>
* @version $Revision: 7121 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
* @since 1.3
*/
public abstract class AbstractParameter extends AbstractExpression implements Parameter {
//--------------------------------------------------------------------------
/**
* {@inheritDoc}
*/
public final Condition isNull() {
Null condition = new Null();
condition.setNot(false);
condition.setExpression(this);
return condition;
}
/**
* {@inheritDoc}
*/
public final Condition isNotNull() {
Null condition = new Null();
condition.setNot(true);
condition.setExpression(this);
return condition;
}
//--------------------------------------------------------------------------
}